(function (global, factory) {
	// debugger
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
		typeof define === 'function' && define.amd ? define('i18next', factory) :
		(global.i18next = factory());
}(this, function () {
	'use strict';

	var babelHelpers = {};
	babelHelpers.typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
		return typeof obj;
	} : function (obj) {
		return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj;
	};

	babelHelpers.classCallCheck = function (instance, Constructor) {
		if (!(instance instanceof Constructor)) {
			throw new TypeError("Cannot call a class as a function");
		}
	};

	babelHelpers.extends = Object.assign || function (target) {
		for (var i = 1; i < arguments.length; i++) {
			var source = arguments[i];

			for (var key in source) {
				if (Object.prototype.hasOwnProperty.call(source, key)) {
					target[key] = source[key];
				}
			}
		}

		return target;
	};

	babelHelpers.inherits = function (subClass, superClass) {
		if (typeof superClass !== "function" && superClass !== null) {
			throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
		}

		subClass.prototype = Object.create(superClass && superClass.prototype, {
			constructor: {
				value: subClass,
				enumerable: false,
				writable: true,
				configurable: true
			}
		});
		if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
	};

	babelHelpers.possibleConstructorReturn = function (self, call) {
		if (!self) {
			throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
		}

		return call && (typeof call === "object" || typeof call === "function") ? call : self;
	};

	babelHelpers.slicedToArray = function () {
		function sliceIterator(arr, i) {
			var _arr = [];
			var _n = true;
			var _d = false;
			var _e = undefined;

			try {
				for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
					_arr.push(_s.value);

					if (i && _arr.length === i) break;
				}
			} catch (err) {
				_d = true;
				_e = err;
			} finally {
				try {
					if (!_n && _i["return"]) _i["return"]();
				} finally {
					if (_d) throw _e;
				}
			}

			return _arr;
		}

		return function (arr, i) {
			if (Array.isArray(arr)) {
				return arr;
			} else if (Symbol.iterator in Object(arr)) {
				return sliceIterator(arr, i);
			} else {
				throw new TypeError("Invalid attempt to destructure non-iterable instance");
			}
		};
	}();

	babelHelpers;

	var consoleLogger = {
		type: 'logger',

		log: function log(args) {
			this._output('log', args);
		},
		warn: function warn(args) {
			this._output('warn', args);
		},
		error: function error(args) {
			this._output('error', args);
		},
		_output: function _output(type, args) {
			if (console && console[type]) console[type].apply(console, Array.prototype.slice.call(args));
		}
	};

	var Logger = function () {
		function Logger(concreteLogger) {
			var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
			babelHelpers.classCallCheck(this, Logger);

			this.subs = [];
			this.init(concreteLogger, options);
		}

		Logger.prototype.init = function init(concreteLogger) {
			var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];

			this.prefix = options.prefix || 'i18next:';
			this.logger = concreteLogger || consoleLogger;
			this.options = options;
			this.debug = options.debug === false ? false : true;
		};

		Logger.prototype.setDebug = function setDebug(bool) {
			this.debug = bool;
			this.subs.forEach(function (sub) {
				sub.setDebug(bool);
			});
		};

		Logger.prototype.log = function log() {
			this.forward(arguments, 'log', '', true);
		};

		Logger.prototype.warn = function warn() {
			this.forward(arguments, 'warn', '', true);
		};

		Logger.prototype.error = function error() {
			this.forward(arguments, 'error', '');
		};

		Logger.prototype.deprecate = function deprecate() {
			this.forward(arguments, 'warn', 'WARNING DEPRECATED: ', true);
		};

		Logger.prototype.forward = function forward(args, lvl, prefix, debugOnly) {
			if (debugOnly && !this.debug) return;
			if (typeof args[0] === 'string') args[0] = prefix + this.prefix + ' ' + args[0];
			this.logger[lvl](args);
		};

		Logger.prototype.create = function create(moduleName) {
			var sub = new Logger(this.logger, babelHelpers.extends({
				prefix: this.prefix + ':' + moduleName + ':'
			}, this.options));
			this.subs.push(sub);

			return sub;
		};

		// createInstance(options = {}) {
		//   return new Logger(options, callback);
		// }

		return Logger;
	}();

	;

	var baseLogger = new Logger();

	var EventEmitter = function () {
		function EventEmitter() {
			babelHelpers.classCallCheck(this, EventEmitter);

			this.observers = {};
		}

		EventEmitter.prototype.on = function on(events, listener) {
			var _this = this;

			events.split(' ').forEach(function (event) {
				_this.observers[event] = _this.observers[event] || [];
				_this.observers[event].push(listener);
			});
		};

		EventEmitter.prototype.off = function off(event, listener) {
			var _this2 = this;

			if (!this.observers[event]) {
				return;
			}

			this.observers[event].forEach(function () {
				if (!listener) {
					delete _this2.observers[event];
				} else {
					var index = _this2.observers[event].indexOf(listener);
					if (index > -1) {
						_this2.observers[event].splice(index, 1);
					}
				}
			});
		};

		EventEmitter.prototype.emit = function emit(event) {
			for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
				args[_key - 1] = arguments[_key];
			}

			if (this.observers[event]) {
				this.observers[event].forEach(function (observer) {
					observer.apply(undefined, args);
				});
			}

			if (this.observers['*']) {
				this.observers['*'].forEach(function (observer) {
					var _ref;

					observer.apply(observer, (_ref = [event]).concat.apply(_ref, args));
				});
			}
		};

		return EventEmitter;
	}();

	function makeString(object) {
		if (object == null) return '';
		return '' + object;
	}

	function copy(a, s, t) {
		a.forEach(function (m) {
			if (s[m]) t[m] = s[m];
		});
	}

	function getLastOfPath(object, path, Empty) {
		function cleanKey(key) {
			return key && key.indexOf('###') > -1 ? key.replace(/###/g, '.') : key;
		}

		var stack = typeof path !== 'string' ? [].concat(path) : path.split('.');
		while (stack.length > 1) {
			if (!object) return {};

			var key = cleanKey(stack.shift());
			if (!object[key] && Empty) object[key] = new Empty();
			object = object[key];
		}

		if (!object) return {};
		return {
			obj: object,
			k: cleanKey(stack.shift())
		};
	}

	function setPath(object, path, newValue) {
		var _getLastOfPath = getLastOfPath(object, path, Object);

		var obj = _getLastOfPath.obj;
		var k = _getLastOfPath.k;


		obj[k] = newValue;
	}

	function pushPath(object, path, newValue, concat) {
		var _getLastOfPath2 = getLastOfPath(object, path, Object);

		var obj = _getLastOfPath2.obj;
		var k = _getLastOfPath2.k;


		obj[k] = obj[k] || [];
		if (concat) obj[k] = obj[k].concat(newValue);
		if (!concat) obj[k].push(newValue);
	}

	function getPath(object, path) {
		var _getLastOfPath3 = getLastOfPath(object, path);

		var obj = _getLastOfPath3.obj;
		var k = _getLastOfPath3.k;


		if (!obj) return undefined;
		return obj[k];
	}

	function deepExtend(target, source, overwrite) {
		for (var prop in source) {
			if (prop in target) {
				// If we reached a leaf string in target or source then replace with source or skip depending on the 'overwrite' switch
				if (typeof target[prop] === 'string' || target[prop] instanceof String || typeof source[prop] === 'string' || source[prop] instanceof String) {
					if (overwrite) target[prop] = source[prop];
				} else {
					deepExtend(target[prop], source[prop], overwrite);
				}
			} else {
				target[prop] = source[prop];
			}
		}
		return target;
	}

	function regexEscape(str) {
		return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, '\\$&');
	}

	/* eslint-disable */
	var _entityMap = {
		"&": "&amp;",
		"<": "&lt;",
		">": "&gt;",
		'"': '&quot;',
		"'": '&#39;',
		"/": '&#x2F;'
	};
	/* eslint-enable */

	function escape(data) {
		if (typeof data === 'string') {
			return data.replace(/[&<>"'\/]/g, function (s) {
				return _entityMap[s];
			});
		} else {
			return data;
		}
	}

	var ResourceStore = function (_EventEmitter) {
		babelHelpers.inherits(ResourceStore, _EventEmitter);

		function ResourceStore() {
			var data = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
			var options = arguments.length <= 1 || arguments[1] === undefined ? {
				ns: ['translation'],
				defaultNS: 'translation'
			} : arguments[1];
			babelHelpers.classCallCheck(this, ResourceStore);

			var _this = babelHelpers.possibleConstructorReturn(this, _EventEmitter.call(this));

			_this.data = data;
			_this.options = options;
			return _this;
		}

		ResourceStore.prototype.addNamespaces = function addNamespaces(ns) {
			if (this.options.ns.indexOf(ns) < 0) {
				this.options.ns.push(ns);
			}
		};

		ResourceStore.prototype.removeNamespaces = function removeNamespaces(ns) {
			var index = this.options.ns.indexOf(ns);
			if (index > -1) {
				this.options.ns.splice(index, 1);
			}
		};

		ResourceStore.prototype.getResource = function getResource(lng, ns, key) {
			var options = arguments.length <= 3 || arguments[3] === undefined ? {} : arguments[3];

			var keySeparator = options.keySeparator || this.options.keySeparator;
			if (keySeparator === undefined) keySeparator = '.';

			var path = [lng, ns];
			if (key && typeof key !== 'string') path = path.concat(key);
			if (key && typeof key === 'string') path = path.concat(keySeparator ? key.split(keySeparator) : key);

			if (lng.indexOf('.') > -1) {
				path = lng.split('.');
			}

			return getPath(this.data, path);
		};

		ResourceStore.prototype.addResource = function addResource(lng, ns, key, value) {
			var options = arguments.length <= 4 || arguments[4] === undefined ? {
				silent: false
			} : arguments[4];

			var keySeparator = this.options.keySeparator;
			if (keySeparator === undefined) keySeparator = '.';

			var path = [lng, ns];
			if (key) path = path.concat(keySeparator ? key.split(keySeparator) : key);

			if (lng.indexOf('.') > -1) {
				path = lng.split('.');
				value = ns;
				ns = path[1];
			}

			this.addNamespaces(ns);

			setPath(this.data, path, value);

			if (!options.silent) this.emit('added', lng, ns, key, value);
		};

		ResourceStore.prototype.addResources = function addResources(lng, ns, resources) {
			for (var m in resources) {
				if (typeof resources[m] === 'string') this.addResource(lng, ns, m, resources[m], {
					silent: true
				});
			}
			this.emit('added', lng, ns, resources);
		};

		ResourceStore.prototype.addResourceBundle = function addResourceBundle(lng, ns, resources, deep, overwrite) {
			var path = [lng, ns];
			if (lng.indexOf('.') > -1) {
				path = lng.split('.');
				deep = resources;
				resources = ns;
				ns = path[1];
			}

			this.addNamespaces(ns);

			var pack = getPath(this.data, path) || {};

			if (deep) {
				deepExtend(pack, resources, overwrite);
			} else {
				pack = babelHelpers.extends({}, pack, resources);
			}

			setPath(this.data, path, pack);

			this.emit('added', lng, ns, resources);
		};

		ResourceStore.prototype.removeResourceBundle = function removeResourceBundle(lng, ns) {
			if (this.hasResourceBundle(lng, ns)) {
				delete this.data[lng][ns];
			}
			this.removeNamespaces(ns);

			this.emit('removed', lng, ns);
		};

		ResourceStore.prototype.hasResourceBundle = function hasResourceBundle(lng, ns) {
			return this.getResource(lng, ns) !== undefined;
		};

		ResourceStore.prototype.getResourceBundle = function getResourceBundle(lng, ns) {
			if (!ns) ns = this.options.defaultNS;

			// TODO: COMPATIBILITY remove extend in v2.1.0
			if (this.options.compatibilityAPI === 'v1') return babelHelpers.extends({}, this.getResource(lng, ns));

			return this.getResource(lng, ns);
		};

		ResourceStore.prototype.toJSON = function toJSON() {
			return this.data;
		};

		return ResourceStore;
	}(EventEmitter);

	var postProcessor = {

		processors: {},

		addPostProcessor: function addPostProcessor(module) {
			this.processors[module.name] = module;
		},
		handle: function handle(processors, value, key, options, translator) {
			var _this = this;

			processors.forEach(function (processor) {
				if (_this.processors[processor]) value = _this.processors[processor].process(value, key, options, translator);
			});

			return value;
		}
	};

	function convertInterpolation(options) {

		options.interpolation = {
			unescapeSuffix: 'HTML'
		};

		options.interpolation.prefix = options.interpolationPrefix || '__';
		options.interpolation.suffix = options.interpolationSuffix || '__';
		options.interpolation.escapeValue = options.escapeInterpolation || false;

		options.interpolation.nestingPrefix = options.reusePrefix || '$t(';
		options.interpolation.nestingSuffix = options.reuseSuffix || ')';

		return options;
	}

	function convertAPIOptions(options) {
		if (options.resStore) options.resources = options.resStore;

		if (options.ns && options.ns.defaultNs) {
			options.defaultNS = options.ns.defaultNs;
			options.ns = options.ns.namespaces;
		} else {
			options.defaultNS = options.ns || 'translation';
		}

		if (options.fallbackToDefaultNS && options.defaultNS) options.fallbackNS = options.defaultNS;

		options.saveMissing = options.sendMissing;
		options.saveMissingTo = options.sendMissingTo || 'current';
		options.returnNull = options.fallbackOnNull ? false : true;
		options.returnEmptyString = options.fallbackOnEmpty ? false : true;
		options.returnObjects = options.returnObjectTrees;
		options.joinArrays = '\n';

		options.returnedObjectHandler = options.objectTreeKeyHandler;
		options.parseMissingKeyHandler = options.parseMissingKey;
		options.appendNamespaceToMissingKey = true;

		options.nsSeparator = options.nsseparator;
		options.keySeparator = options.keyseparator;

		if (options.shortcutFunction === 'sprintf') {
			options.overloadTranslationOptionHandler = function (args) {
				var values = [];

				for (var i = 1; i < args.length; i++) {
					values.push(args[i]);
				}

				return {
					postProcess: 'sprintf',
					sprintf: values
				};
			};
		}

		options.whitelist = options.lngWhitelist;
		options.preload = options.preload;
		if (options.load === 'current') options.load = 'currentOnly';
		if (options.load === 'unspecific') options.load = 'languageOnly';

		// backend
		options.backend = options.backend || {};
		options.backend.loadPath = options.resGetPath || 'locales/__lng__/__ns__.json';
		options.backend.addPath = options.resPostPath || 'locales/add/__lng__/__ns__';
		options.backend.allowMultiLoading = options.dynamicLoad;

		// cache
		options.cache = options.cache || {};
		options.cache.prefix = 'res_';
		options.cache.expirationTime = 7 * 24 * 60 * 60 * 1000;
		options.cache.enabled = options.useLocalStorage ? true : false;

		options = convertInterpolation(options);
		if (options.defaultVariables) options.interpolation.defaultVariables = options.defaultVariables;

		// TODO: deprecation
		// if (options.getAsync === false) throw deprecation error

		return options;
	}

	function convertJSONOptions(options) {
		options = convertInterpolation(options);
		options.joinArrays = '\n';

		return options;
	}

	function convertTOptions(options) {
		if (options.interpolationPrefix || options.interpolationSuffix || options.escapeInterpolation) {
			options = convertInterpolation(options);
		}

		options.nsSeparator = options.nsseparator;
		options.keySeparator = options.keyseparator;

		options.returnObjects = options.returnObjectTrees;

		return options;
	}

	function appendBackwardsAPI(i18n) {
		i18n.lng = function () {
			baseLogger.deprecate('i18next.lng() can be replaced by i18next.language for detected language or i18next.languages for languages ordered by translation lookup.');
			return i18n.services.languageUtils.toResolveHierarchy(i18n.language)[0];
		};

		i18n.preload = function (lngs, cb) {
			baseLogger.deprecate('i18next.preload() can be replaced with i18next.loadLanguages()');
			i18n.loadLanguages(lngs, cb);
		};

		i18n.setLng = function (lng, options, callback) {
			baseLogger.deprecate('i18next.setLng() can be replaced with i18next.changeLanguage() or i18next.getFixedT() to get a translation function with fixed language or namespace.');
			if (typeof options === 'function') {
				callback = options;
				options = {};
			}
			if (!options) options = {};

			if (options.fixLng === true) {
				if (callback) return callback(null, i18n.getFixedT(lng));
			}

			i18n.changeLanguage(lng, callback);
		};

		i18n.addPostProcessor = function (name, fc) {
			baseLogger.deprecate('i18next.addPostProcessor() can be replaced by i18next.use({ type: \'postProcessor\', name: \'name\', process: fc })');
			i18n.use({
				type: 'postProcessor',
				name: name,
				process: fc
			});
		};
	}

	var Translator = function (_EventEmitter) {
		babelHelpers.inherits(Translator, _EventEmitter);

		function Translator(services) {
			var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
			babelHelpers.classCallCheck(this, Translator);

			var _this = babelHelpers.possibleConstructorReturn(this, _EventEmitter.call(this));

			copy(['resourceStore', 'languageUtils', 'pluralResolver', 'interpolator', 'backendConnector'], services, _this);

			_this.options = options;
			_this.logger = baseLogger.create('translator');
			return _this;
		}

		Translator.prototype.changeLanguage = function changeLanguage(lng) {
			if (lng) this.language = lng;
		};

		Translator.prototype.exists = function exists(key) {
			var options = arguments.length <= 1 || arguments[1] === undefined ? {
				interpolation: {}
			} : arguments[1];

			if (this.options.compatibilityAPI === 'v1') {
				options = convertTOptions(options);
			}

			return this.resolve(key, options) !== undefined;
		};

		Translator.prototype.extractFromKey = function extractFromKey(key, options) {
			var nsSeparator = options.nsSeparator || this.options.nsSeparator;
			if (nsSeparator === undefined) nsSeparator = ':';

			var namespaces = options.ns || this.options.defaultNS;
			if (nsSeparator && key.indexOf(nsSeparator) > -1) {
				var parts = key.split(nsSeparator);
				namespaces = parts[0];
				key = parts[1];
			}
			if (typeof namespaces === 'string') namespaces = [namespaces];

			return {
				key: key,
				namespaces: namespaces
			};
		};

		Translator.prototype.translate = function translate(keys) {
			var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];

			if ((typeof options === 'undefined' ? 'undefined' : babelHelpers.typeof(options)) !== 'object') {
				options = this.options.overloadTranslationOptionHandler(arguments);
			} else if (this.options.compatibilityAPI === 'v1') {
				options = convertTOptions(options);
			}

			// non valid keys handling
			if (keys === undefined || keys === null || keys === '') return '';
			if (typeof keys === 'number') keys = String(keys);
			if (typeof keys === 'string') keys = [keys];

			// return key on CIMode
			var lng = options.lng || this.language;
			if (lng && lng.toLowerCase() === 'cimode') return keys[keys.length - 1];

			// separators
			var keySeparator = options.keySeparator || this.options.keySeparator || '.';

			// get namespace(s)

			var _extractFromKey = this.extractFromKey(keys[keys.length - 1], options);

			var key = _extractFromKey.key;
			var namespaces = _extractFromKey.namespaces;

			var namespace = namespaces[namespaces.length - 1];

			// resolve from store
			var res = this.resolve(keys, options);

			var resType = Object.prototype.toString.apply(res);
			var noObject = ['[object Number]', '[object Function]', '[object RegExp]'];
			var joinArrays = options.joinArrays !== undefined ? options.joinArrays : this.options.joinArrays;

			// object
			if (res && typeof res !== 'string' && noObject.indexOf(resType) < 0 && !(joinArrays && resType === '[object Array]')) {
				if (!options.returnObjects && !this.options.returnObjects) {
					this.logger.warn('accessing an object - but returnObjects options is not enabled!');
					return this.options.returnedObjectHandler ? this.options.returnedObjectHandler(key, res, options) : 'key \'' + key + ' (' + this.language + ')\' returned an object instead of string.';
				}

				var copy = resType === '[object Array]' ? [] : {}; // apply child translation on a copy

				for (var m in res) {
					copy[m] = this.translate('' + key + keySeparator + m, babelHelpers.extends({
						joinArrays: false,
						ns: namespaces
					}, options));
				}
				res = copy;
			}
			// array special treatment
			else if (joinArrays && resType === '[object Array]') {
				res = res.join(joinArrays);
				if (res) res = this.extendTranslation(res, key, options);
			}
			// string, empty or null
			else {
				var usedDefault = false,
					usedKey = false;

				// fallback value
				if (!this.isValidLookup(res) && options.defaultValue !== undefined) {
					usedDefault = true;
					res = options.defaultValue;
				}
				if (!this.isValidLookup(res)) {
					usedKey = true;
					res = key;
				}

				// save missing
				if (usedKey || usedDefault) {
					this.logger.log('missingKey', lng, namespace, key, res);

					if (this.options.saveMissing) {
						var lngs = [];
						if (this.options.saveMissingTo === 'fallback' && this.options.fallbackLng && this.options.fallbackLng[0]) {
							for (var i = 0; i < this.options.fallbackLng.length; i++) {
								lngs.push(this.options.fallbackLng[i]);
							}
						} else if (this.options.saveMissingTo === 'all') {
							lngs = this.languageUtils.toResolveHierarchy(options.lng || this.language);
						} else {
							//(this.options.saveMissingTo === 'current' || (this.options.saveMissingTo === 'fallback' && this.options.fallbackLng[0] === false) ) {
							lngs.push(options.lng || this.language);
						}

						if (this.options.missingKeyHandler) {
							this.options.missingKeyHandler(lngs, namespace, key, res);
						} else if (this.backendConnector && this.backendConnector.saveMissing) {
							this.backendConnector.saveMissing(lngs, namespace, key, res);
						}

						this.emit('missingKey', lngs, namespace, key, res);
					}
				}

				// extend
				res = this.extendTranslation(res, key, options);

				// append namespace if still key
				if (usedKey && res === key && this.options.appendNamespaceToMissingKey) res = namespace + ':' + key;

				// parseMissingKeyHandler
				if (usedKey && this.options.parseMissingKeyHandler) res = this.options.parseMissingKeyHandler(res);
			}

			// return
			return res;
		};

		Translator.prototype.extendTranslation = function extendTranslation(res, key, options) {
			var _this2 = this;

			if (options.interpolation) this.interpolator.init(options);

			// interpolate
			var data = options.replace && typeof options.replace !== 'string' ? options.replace : options;
			if (this.options.interpolation.defaultVariables) data = babelHelpers.extends({}, this.options.interpolation.defaultVariables, data);
			res = this.interpolator.interpolate(res, data);

			// nesting
			res = this.interpolator.nest(res, function () {
				for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
					args[_key] = arguments[_key];
				}

				return _this2.translate.apply(_this2, args);
			}, options);

			if (options.interpolation) this.interpolator.reset();

			// post process
			var postProcess = options.postProcess || this.options.postProcess;
			var postProcessorNames = typeof postProcess === 'string' ? [postProcess] : postProcess;

			if (res !== undefined && postProcessorNames && postProcessorNames.length && options.applyPostProcessor !== false) {
				res = postProcessor.handle(postProcessorNames, res, key, options, this);
			}

			return res;
		};

		Translator.prototype.resolve = function resolve(keys) {
			var _this3 = this;

			var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];

			var found = void 0;

			if (typeof keys === 'string') keys = [keys];

			// forEach possible key
			keys.forEach(function (k) {
				if (_this3.isValidLookup(found)) return;

				var _extractFromKey2 = _this3.extractFromKey(k, options);

				var key = _extractFromKey2.key;
				var namespaces = _extractFromKey2.namespaces;

				if (_this3.options.fallbackNS) namespaces = namespaces.concat(_this3.options.fallbackNS);

				var needsPluralHandling = options.count !== undefined && typeof options.count !== 'string';
				var needsContextHandling = options.context !== undefined && typeof options.context === 'string' && options.context !== '';

				var codes = options.lngs ? options.lngs : _this3.languageUtils.toResolveHierarchy(options.lng || _this3.language);

				namespaces.forEach(function (ns) {
					if (_this3.isValidLookup(found)) return;

					codes.forEach(function (code) {
						if (_this3.isValidLookup(found)) return;

						var finalKey = key;
						var finalKeys = [finalKey];

						var pluralSuffix = void 0;
						if (needsPluralHandling) pluralSuffix = _this3.pluralResolver.getSuffix(code, options.count);

						// fallback for plural if context not found
						if (needsPluralHandling && needsContextHandling) finalKeys.push(finalKey + pluralSuffix);

						// get key for context if needed
						if (needsContextHandling) finalKeys.push(finalKey += '' + _this3.options.contextSeparator + options.context);

						// get key for plural if needed
						if (needsPluralHandling) finalKeys.push(finalKey += pluralSuffix);

						// iterate over finalKeys starting with most specific pluralkey (-> contextkey only) -> singularkey only
						var possibleKey = void 0;
						while (possibleKey = finalKeys.pop()) {
							if (_this3.isValidLookup(found)) continue;
							found = _this3.getResource(code, ns, possibleKey, options);
						}
					});
				});
			});

			return found;
		};

		Translator.prototype.isValidLookup = function isValidLookup(res) {
			return res !== undefined && !(!this.options.returnNull && res === null) && !(!this.options.returnEmptyString && res === '');
		};

		Translator.prototype.getResource = function getResource(code, ns, key) {
			var options = arguments.length <= 3 || arguments[3] === undefined ? {} : arguments[3];

			return this.resourceStore.getResource(code, ns, key, options);
		};

		return Translator;
	}(EventEmitter);

	function capitalize(string) {
		return string.charAt(0).toUpperCase() + string.slice(1);
	}

	var LanguageUtil = function () {
		function LanguageUtil(options) {
			babelHelpers.classCallCheck(this, LanguageUtil);

			this.options = options;

			this.whitelist = this.options.whitelist || false;
			this.logger = baseLogger.create('languageUtils');
		}

		LanguageUtil.prototype.getLanguagePartFromCode = function getLanguagePartFromCode(code) {
			if (code.indexOf('-') < 0) return code;

			var specialCases = ['NB-NO', 'NN-NO', 'nb-NO', 'nn-NO', 'nb-no', 'nn-no'];
			var p = code.split('-');
			return this.formatLanguageCode(specialCases.indexOf(code) > -1 ? p[1].toLowerCase() : p[0]);
		};

		LanguageUtil.prototype.formatLanguageCode = function formatLanguageCode(code) {
			// http://www.iana.org/assignments/language-tags/language-tags.xhtml
			if (typeof code === 'string' && code.indexOf('-') > -1) {
				var specialCases = ['hans', 'hant', 'latn', 'cyrl', 'cans', 'mong', 'arab'];
				var p = code.split('-');

				if (this.options.lowerCaseLng) {
					p = p.map(function (part) {
						return part.toLowerCase();
					});
				} else if (p.length === 2) {
					p[0] = p[0].toLowerCase();
					p[1] = p[1].toUpperCase();

					if (specialCases.indexOf(p[1].toLowerCase()) > -1) p[1] = capitalize(p[1].toLowerCase());
				} else if (p.length === 3) {
					p[0] = p[0].toLowerCase();

					// if lenght 2 guess it's a country
					if (p[1].length === 2) p[1] = p[1].toUpperCase();
					if (p[0] !== 'sgn' && p[2].length === 2) p[2] = p[2].toUpperCase();

					if (specialCases.indexOf(p[1].toLowerCase()) > -1) p[1] = capitalize(p[1].toLowerCase());
					if (specialCases.indexOf(p[2].toLowerCase()) > -1) p[2] = capitalize(p[2].toLowerCase());
				}

				return p.join('-');
			} else {
				return this.options.cleanCode || this.options.lowerCaseLng ? code.toLowerCase() : code;
			}
		};

		LanguageUtil.prototype.isWhitelisted = function isWhitelisted(code) {
			if (this.options.load === 'languageOnly') code = this.getLanguagePartFromCode(code);
			return !this.whitelist || !this.whitelist.length || this.whitelist.indexOf(code) > -1 ? true : false;
		};

		LanguageUtil.prototype.toResolveHierarchy = function toResolveHierarchy(code, fallbackCode) {
			var _this = this;

			fallbackCode = fallbackCode || this.options.fallbackLng || [];
			if (typeof fallbackCode === 'string') fallbackCode = [fallbackCode];

			var codes = [];
			var addCode = function addCode(code) {
				if (_this.isWhitelisted(code)) {
					codes.push(code);
				} else {
					_this.logger.warn('rejecting non-whitelisted language code: ' + code);
				}
			};

			if (typeof code === 'string' && code.indexOf('-') > -1) {
				if (this.options.load !== 'languageOnly') addCode(this.formatLanguageCode(code));
				if (this.options.load !== 'currentOnly') addCode(this.getLanguagePartFromCode(code));
			} else if (typeof code === 'string') {
				addCode(this.formatLanguageCode(code));
			}

			fallbackCode.forEach(function (fc) {
				if (codes.indexOf(fc) < 0) addCode(_this.formatLanguageCode(fc));
			});

			return codes;
		};

		return LanguageUtil;
	}();

	;

	// definition http://translate.sourceforge.net/wiki/l10n/pluralforms
	/* eslint-disable */
	var sets = [{
		lngs: ['ach', 'ak', 'am', 'arn', 'br', 'fil', 'gun', 'ln', 'mfe', 'mg', 'mi', 'oc', 'tg', 'ti', 'tr', 'uz', 'wa'],
		nr: [1, 2],
		fc: 1
	}, {
		lngs: ['af', 'an', 'ast', 'az', 'bg', 'bn', 'ca', 'da', 'de', 'dev', 'el', 'en', 'eo', 'es', 'es_ar', 'et', 'eu', 'fi', 'fo', 'fur', 'fy', 'gl', 'gu', 'ha', 'he', 'hi', 'hu', 'hy', 'ia', 'it', 'kn', 'ku', 'lb', 'mai', 'ml', 'mn', 'mr', 'nah', 'nap', 'nb', 'ne', 'nl', 'nn', 'no', 'nso', 'pa', 'pap', 'pms', 'ps', 'pt', 'pt_br', 'rm', 'sco', 'se', 'si', 'so', 'son', 'sq', 'sv', 'sw', 'ta', 'te', 'tk', 'ur', 'yo'],
		nr: [1, 2],
		fc: 2
	}, {
		lngs: ['ay', 'bo', 'cgg', 'fa', 'id', 'ja', 'jbo', 'ka', 'kk', 'km', 'ko', 'ky', 'lo', 'ms', 'sah', 'su', 'th', 'tt', 'ug', 'vi', 'wo', 'zh'],
		nr: [1],
		fc: 3
	}, {
		lngs: ['be', 'bs', 'dz', 'hr', 'ru', 'sr', 'uk'],
		nr: [1, 2, 5],
		fc: 4
	}, {
		lngs: ['ar'],
		nr: [0, 1, 2, 3, 11, 100],
		fc: 5
	}, {
		lngs: ['cs', 'sk'],
		nr: [1, 2, 5],
		fc: 6
	}, {
		lngs: ['csb', 'pl'],
		nr: [1, 2, 5],
		fc: 7
	}, {
		lngs: ['cy'],
		nr: [1, 2, 3, 8],
		fc: 8
	}, {
		lngs: ['fr'],
		nr: [1, 2],
		fc: 9
	}, {
		lngs: ['ga'],
		nr: [1, 2, 3, 7, 11],
		fc: 10
	}, {
		lngs: ['gd'],
		nr: [1, 2, 3, 20],
		fc: 11
	}, {
		lngs: ['is'],
		nr: [1, 2],
		fc: 12
	}, {
		lngs: ['jv'],
		nr: [0, 1],
		fc: 13
	}, {
		lngs: ['kw'],
		nr: [1, 2, 3, 4],
		fc: 14
	}, {
		lngs: ['lt'],
		nr: [1, 2, 10],
		fc: 15
	}, {
		lngs: ['lv'],
		nr: [1, 2, 0],
		fc: 16
	}, {
		lngs: ['mk'],
		nr: [1, 2],
		fc: 17
	}, {
		lngs: ['mnk'],
		nr: [0, 1, 2],
		fc: 18
	}, {
		lngs: ['mt'],
		nr: [1, 2, 11, 20],
		fc: 19
	}, {
		lngs: ['or'],
		nr: [2, 1],
		fc: 2
	}, {
		lngs: ['ro'],
		nr: [1, 2, 20],
		fc: 20
	}, {
		lngs: ['sl'],
		nr: [5, 1, 2, 3],
		fc: 21
	}];

	var _rulesPluralsTypes = {
		1: function _(n) {
			return Number(n > 1);
		},
		2: function _(n) {
			return Number(n != 1);
		},
		3: function _(n) {
			return 0;
		},
		4: function _(n) {
			return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
		},
		5: function _(n) {
			return Number(n === 0 ? 0 : n == 1 ? 1 : n == 2 ? 2 : n % 100 >= 3 && n % 100 <= 10 ? 3 : n % 100 >= 11 ? 4 : 5);
		},
		6: function _(n) {
			return Number(n == 1 ? 0 : n >= 2 && n <= 4 ? 1 : 2);
		},
		7: function _(n) {
			return Number(n == 1 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
		},
		8: function _(n) {
			return Number(n == 1 ? 0 : n == 2 ? 1 : n != 8 && n != 11 ? 2 : 3);
		},
		9: function _(n) {
			return Number(n >= 2);
		},
		10: function _(n) {
			return Number(n == 1 ? 0 : n == 2 ? 1 : n < 7 ? 2 : n < 11 ? 3 : 4);
		},
		11: function _(n) {
			return Number(n == 1 || n == 11 ? 0 : n == 2 || n == 12 ? 1 : n > 2 && n < 20 ? 2 : 3);
		},
		12: function _(n) {
			return Number(n % 10 != 1 || n % 100 == 11);
		},
		13: function _(n) {
			return Number(n !== 0);
		},
		14: function _(n) {
			return Number(n == 1 ? 0 : n == 2 ? 1 : n == 3 ? 2 : 3);
		},
		15: function _(n) {
			return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
		},
		16: function _(n) {
			return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n !== 0 ? 1 : 2);
		},
		17: function _(n) {
			return Number(n == 1 || n % 10 == 1 ? 0 : 1);
		},
		18: function _(n) {
			return Number(n == 0 ? 0 : n == 1 ? 1 : 2);
		},
		19: function _(n) {
			return Number(n == 1 ? 0 : n === 0 || n % 100 > 1 && n % 100 < 11 ? 1 : n % 100 > 10 && n % 100 < 20 ? 2 : 3);
		},
		20: function _(n) {
			return Number(n == 1 ? 0 : n === 0 || n % 100 > 0 && n % 100 < 20 ? 1 : 2);
		},
		21: function _(n) {
			return Number(n % 100 == 1 ? 1 : n % 100 == 2 ? 2 : n % 100 == 3 || n % 100 == 4 ? 3 : 0);
		}
	};
	/* eslint-enable */

	function createRules() {
		var l,
			rules = {};
		sets.forEach(function (set) {
			set.lngs.forEach(function (l) {
				return rules[l] = {
					numbers: set.nr,
					plurals: _rulesPluralsTypes[set.fc]
				};
			});
		});
		return rules;
	}

	var PluralResolver = function () {
		function PluralResolver(languageUtils) {
			var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
			babelHelpers.classCallCheck(this, PluralResolver);

			this.languageUtils = languageUtils;
			this.options = options;

			this.logger = baseLogger.create('pluralResolver');

			this.rules = createRules();
		}

		PluralResolver.prototype.addRule = function addRule(lng, obj) {
			this.rules[lng] = obj;
		};

		PluralResolver.prototype.getRule = function getRule(code) {
			return this.rules[this.languageUtils.getLanguagePartFromCode(code)];
		};

		PluralResolver.prototype.needsPlural = function needsPlural(code) {
			var rule = this.getRule(code);

			return rule && rule.numbers.length <= 1 ? false : true;
		};

		PluralResolver.prototype.getSuffix = function getSuffix(code, count) {
			var rule = this.getRule(code);

			if (rule) {
				if (rule.numbers.length === 1) return ''; // only singular

				var idx = rule.noAbs ? rule.plurals(count) : rule.plurals(Math.abs(count));
				var suffix = rule.numbers[idx];

				// special treatment for lngs only having singular and plural
				if (rule.numbers.length === 2 && rule.numbers[0] === 1) {
					if (suffix === 2) {
						suffix = 'plural';
					} else if (suffix === 1) {
						suffix = '';
					}
				}

				// COMPATIBILITY JSON
				if (this.options.compatibilityJSON === 'v1') {
					if (suffix === 1) return '';
					if (typeof suffix === 'number') return '_plural_' + suffix.toString();
				}

				return this.options.prepend && suffix.toString() ? this.options.prepend + suffix.toString() : suffix.toString();
			} else {
				this.logger.warn('no plural rule found for: ' + code);
				return '';
			}
		};

		return PluralResolver;
	}();

	;

	var Interpolator = function () {
		function Interpolator() {
			var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
			babelHelpers.classCallCheck(this, Interpolator);

			this.logger = baseLogger.create('interpolator');

			this.init(options, true);
		}

		Interpolator.prototype.init = function init() {
			var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
			var reset = arguments[1];

			if (reset) this.options = options;
			if (!options.interpolation) options.interpolation = {
				escapeValue: true
			};

			var iOpts = options.interpolation;

			this.escapeValue = iOpts.escapeValue;

			this.prefix = iOpts.prefix ? regexEscape(iOpts.prefix) : iOpts.prefixEscaped || '{{';
			this.suffix = iOpts.suffix ? regexEscape(iOpts.suffix) : iOpts.suffixEscaped || '}}';

			this.unescapePrefix = iOpts.unescapeSuffix ? '' : iOpts.unescapePrefix || '-';
			this.unescapeSuffix = this.unescapePrefix ? '' : iOpts.unescapeSuffix || '';

			this.nestingPrefix = iOpts.nestingPrefix ? regexEscape(iOpts.nestingPrefix) : iOpts.nestingPrefixEscaped || regexEscape('$t(');
			this.nestingSuffix = iOpts.nestingSuffix ? regexEscape(iOpts.nestingSuffix) : iOpts.nestingSuffixEscaped || regexEscape(')');

			// the regexp
			var regexpStr = this.prefix + '(.+?)' + this.suffix;
			this.regexp = new RegExp(regexpStr, 'g');

			var regexpUnescapeStr = this.prefix + this.unescapePrefix + '(.+?)' + this.unescapeSuffix + this.suffix;
			this.regexpUnescape = new RegExp(regexpUnescapeStr, 'g');

			var nestingRegexpStr = this.nestingPrefix + '(.+?)' + this.nestingSuffix;
			this.nestingRegexp = new RegExp(nestingRegexpStr, 'g');
		};

		Interpolator.prototype.reset = function reset() {
			if (this.options) this.init(this.options);
		};

		Interpolator.prototype.interpolate = function interpolate(str, data) {
			var match = void 0,
				value = void 0;

			function regexSafe(val) {
				return val.replace(/\$/g, '$$$$');
			}

			// unescape if has unescapePrefix/Suffix
			while (match = this.regexpUnescape.exec(str)) {
				var _value = getPath(data, match[1].trim());
				str = str.replace(match[0], _value);
			}

			// regular escape on demand
			while (match = this.regexp.exec(str)) {
				value = getPath(data, match[1].trim());
				if (typeof value !== 'string') value = makeString(value);
				if (!value) {
					this.logger.warn('missed to pass in variable ' + match[1] + ' for interpolating ' + str);
					value = '';
				}
				value = this.escapeValue ? regexSafe(escape(value)) : regexSafe(value);
				str = str.replace(match[0], value);
				this.regexp.lastIndex = 0;
			}
			return str;
		};

		Interpolator.prototype.nest = function nest(str, fc) {
			var options = arguments.length <= 2 || arguments[2] === undefined ? {} : arguments[2];

			var match = void 0,
				value = void 0;

			var clonedOptions = JSON.parse(JSON.stringify(options));
			clonedOptions.applyPostProcessor = false; // avoid post processing on nested lookup

			function regexSafe(val) {
				return val.replace(/\$/g, '$$$$');
			}

			// if value is something like "myKey": "lorem $(anotherKey, { "count": {{aValueInOptions}} })"
			function handleHasOptions(key) {
				if (key.indexOf(',') < 0) return key;

				var p = key.split(',');
				key = p.shift();
				var optionsString = p.join(',');
				optionsString = this.interpolate(optionsString, clonedOptions);

				try {
					clonedOptions = JSON.parse(optionsString);
				} catch (e) {
					this.logger.error('failed parsing options string in nesting for key ' + key, e);
				}

				return key;
			}

			// regular escape on demand
			while (match = this.nestingRegexp.exec(str)) {
				value = fc(handleHasOptions.call(this, match[1].trim()), clonedOptions);
				if (typeof value !== 'string') value = makeString(value);
				if (!value) {
					this.logger.warn('missed to pass in variable ' + match[1] + ' for interpolating ' + str);
					value = '';
				}
				value = this.escapeValue ? regexSafe(escape(value)) : regexSafe(value);
				str = str.replace(match[0], value);
				this.regexp.lastIndex = 0;
			}
			return str;
		};

		return Interpolator;
	}();

	function remove(arr, what) {
		var found = arr.indexOf(what);

		while (found !== -1) {
			arr.splice(found, 1);
			found = arr.indexOf(what);
		}
	}

	var Connector = function (_EventEmitter) {
		babelHelpers.inherits(Connector, _EventEmitter);

		function Connector(backend, store, services) {
			var options = arguments.length <= 3 || arguments[3] === undefined ? {} : arguments[3];
			babelHelpers.classCallCheck(this, Connector);

			var _this = babelHelpers.possibleConstructorReturn(this, _EventEmitter.call(this));

			_this.backend = backend;
			_this.store = store;
			_this.services = services;
			_this.options = options;
			_this.logger = baseLogger.create('backendConnector');

			_this.state = {};
			_this.queue = [];

			_this.backend && _this.backend.init && _this.backend.init(services, options.backend, options);
			return _this;
		}

		Connector.prototype.queueLoad = function queueLoad(languages, namespaces, callback) {
			var _this2 = this;

			// find what needs to be loaded
			var toLoad = [],
				pending = [],
				toLoadLanguages = [],
				toLoadNamespaces = [];

			languages.forEach(function (lng) {
				var hasAllNamespaces = true;

				namespaces.forEach(function (ns) {
					var name = lng + '|' + ns;

					if (_this2.store.hasResourceBundle(lng, ns)) {
						_this2.state[name] = 2; // loaded
					} else if (_this2.state[name] < 0) {
						// nothing to do for err
					} else if (_this2.state[name] === 1) {
						if (pending.indexOf(name) < 0) pending.push(name);
					} else {
						_this2.state[name] = 1; // pending

						hasAllNamespaces = false;

						if (pending.indexOf(name) < 0) pending.push(name);
						if (toLoad.indexOf(name) < 0) toLoad.push(name);
						if (toLoadNamespaces.indexOf(ns) < 0) toLoadNamespaces.push(ns);
					}
				});

				if (!hasAllNamespaces) toLoadLanguages.push(lng);
			});

			if (toLoad.length || pending.length) {
				this.queue.push({
					pending: pending,
					loaded: {},
					errors: [],
					callback: callback
				});
			}

			return {
				toLoad: toLoad,
				pending: pending,
				toLoadLanguages: toLoadLanguages,
				toLoadNamespaces: toLoadNamespaces
			};
		};

		Connector.prototype.loaded = function loaded(name, err, data) {
			var _this3 = this;

			var _name$split = name.split('|');

			var _name$split2 = babelHelpers.slicedToArray(_name$split, 2);

			var lng = _name$split2[0];
			var ns = _name$split2[1];


			if (err) this.emit('failedLoading', lng, ns, err);

			if (data) {
				this.store.addResourceBundle(lng, ns, data);
			}

			// set loaded
			this.state[name] = err ? -1 : 2;
			// callback if ready
			this.queue.forEach(function (q) {
				pushPath(q.loaded, [lng], ns);
				remove(q.pending, name);

				if (err) q.errors.push(err);

				if (q.pending.length === 0 && !q.done) {
					q.errors.length ? q.callback(q.errors) : q.callback();
					_this3.emit('loaded', q.loaded);
					q.done = true;
				}
			});

			// remove done load requests
			this.queue = this.queue.filter(function (q) {
				return !q.done;
			});
		};

		Connector.prototype.read = function read(lng, ns, fcName, tried, wait, callback) {
			var _this4 = this;

			if (!tried) tried = 0;
			if (!wait) wait = 250;

			if (!lng.length) return callback(null, {}); // noting to load

			this.backend[fcName](lng, ns, function (err, data) {
				if (err && data /* = retryFlag */ && tried < 5) {
					setTimeout(function () {
						_this4.read.call(_this4, lng, ns, fcName, ++tried, wait * 2, callback);
					}, wait);
					return;
				}
				callback(err, data);
			});
		};

		Connector.prototype.load = function load(languages, namespaces, callback) {
			var _this5 = this;

			if (!this.backend) {
				this.logger.warn('No backend was added via i18next.use. Will not load resources.');
				return callback && callback();
			}
			var options = babelHelpers.extends({}, this.backend.options, this.options.backend);

			if (typeof languages === 'string') languages = this.services.languageUtils.toResolveHierarchy(languages);
			if (typeof namespaces === 'string') namespaces = [namespaces];

			var toLoad = this.queueLoad(languages, namespaces, callback);
			if (!toLoad.toLoad.length) {
				if (!toLoad.pending.length) callback(); // nothing to load and no pendings...callback now
				return; // pendings will trigger callback
			}

			// load with multi-load
			if (options.allowMultiLoading && this.backend.readMulti) {
				this.read(toLoad.toLoadLanguages, toLoad.toLoadNamespaces, 'readMulti', null, null, function (err, data) {
					if (err) _this5.logger.warn('loading namespaces ' + toLoad.toLoadNamespaces.join(', ') + ' for languages ' + toLoad.toLoadLanguages.join(', ') + ' via multiloading failed', err);
					if (!err && data) _this5.logger.log('loaded namespaces ' + toLoad.toLoadNamespaces.join(', ') + ' for languages ' + toLoad.toLoadLanguages.join(', ') + ' via multiloading', data);

					toLoad.toLoad.forEach(function (name) {
						var _name$split3 = name.split('|');

						var _name$split4 = babelHelpers.slicedToArray(_name$split3, 2);

						var l = _name$split4[0];
						var n = _name$split4[1];


						var bundle = getPath(data, [l, n]);
						if (bundle) {
							_this5.loaded(name, err, bundle);
						} else {
							var _err = 'loading namespace ' + n + ' for language ' + l + ' via multiloading failed';
							_this5.loaded(name, _err);
							_this5.logger.error(_err);
						}
					});
				});
			}

			// load one by one
			else {
				(function () {
					var read = function read(name) {
						var _this6 = this;

						var _name$split5 = name.split('|');

						var _name$split6 = babelHelpers.slicedToArray(_name$split5, 2);

						var lng = _name$split6[0];
						var ns = _name$split6[1];


						this.read(lng, ns, 'read', null, null, function (err, data) {
							if (err) _this6.logger.warn('loading namespace ' + ns + ' for language ' + lng + ' failed', err);
							if (!err && data) _this6.logger.log('loaded namespace ' + ns + ' for language ' + lng, data);

							_this6.loaded(name, err, data);
						});
					};

					;

					toLoad.toLoad.forEach(function (name) {
						read.call(_this5, name);
					});
				})();
			}
		};

		Connector.prototype.saveMissing = function saveMissing(languages, namespace, key, fallbackValue) {
			if (this.backend && this.backend.create) this.backend.create(languages, namespace, key, fallbackValue);

			// write to store to avoid resending
			this.store.addResource(languages[0], namespace, key, fallbackValue);
		};

		return Connector;
	}(EventEmitter);

	var Connector$1 = function (_EventEmitter) {
		babelHelpers.inherits(Connector, _EventEmitter);

		function Connector(cache, store, services) {
			var options = arguments.length <= 3 || arguments[3] === undefined ? {} : arguments[3];
			babelHelpers.classCallCheck(this, Connector);

			var _this = babelHelpers.possibleConstructorReturn(this, _EventEmitter.call(this));

			_this.cache = cache;
			_this.store = store;
			_this.services = services;
			_this.options = options;
			_this.logger = baseLogger.create('cacheConnector');

			_this.cache && _this.cache.init && _this.cache.init(services, options.cache, options);
			return _this;
		}

		Connector.prototype.load = function load(languages, namespaces, callback) {
			var _this2 = this;

			if (!this.cache) return callback && callback();
			var options = babelHelpers.extends({}, this.cache.options, this.options.cache);

			if (typeof languages === 'string') languages = this.services.languageUtils.toResolveHierarchy(languages);
			if (typeof namespaces === 'string') namespaces = [namespaces];

			if (options.enabled) {
				this.cache.load(languages, function (err, data) {
					if (err) _this2.logger.error('loading languages ' + languages.join(', ') + ' from cache failed', err);
					if (data) {
						for (var l in data) {
							for (var n in data[l]) {
								if (n === 'i18nStamp') continue;
								var bundle = data[l][n];
								if (bundle) _this2.store.addResourceBundle(l, n, bundle);
							}
						}
					}
					if (callback) callback();
				});
			} else {
				if (callback) callback();
			}
		};

		Connector.prototype.save = function save() {
			if (this.cache && this.options.cache && this.options.cache.enabled) this.cache.save(this.store.data);
		};

		return Connector;
	}(EventEmitter);

	function get() {
		return {
			debug: false,
			initImmediate: true,

			ns: ['translation'],
			defaultNS: ['translation'],
			fallbackLng: ['dev'],
			fallbackNS: false, // string or array of namespaces

			whitelist: false, // array with whitelisted languages
			load: 'all', // | currentOnly | languageOnly
			preload: false, // array with preload languages

			keySeparator: '.',
			nsSeparator: ':',
			pluralSeparator: '_',
			contextSeparator: '_',

			saveMissing: false, // enable to send missing values
			saveMissingTo: 'fallback', // 'current' || 'all'
			missingKeyHandler: false, // function(lng, ns, key, fallbackValue) -> override if prefer on handling

			postProcess: false, // string or array of postProcessor names
			returnNull: true, // allows null value as valid translation
			returnEmptyString: true, // allows empty string value as valid translation
			returnObjects: false,
			joinArrays: false, // or string to join array
			returnedObjectHandler: function returnedObjectHandler() {}, // function(key, value, options) triggered if key returns object but returnObjects is set to false
			parseMissingKeyHandler: false, // function(key) parsed a key that was not found in t() before returning
			appendNamespaceToMissingKey: false,
			overloadTranslationOptionHandler: function overloadTranslationOptionHandler(args) {
				return {
					defaultValue: args[1]
				};
			},

			interpolation: {
				escapeValue: true,
				prefix: '{{',
				suffix: '}}',
				// prefixEscaped: '{{',
				// suffixEscaped: '}}',
				// unescapeSuffix: '',
				unescapePrefix: '-',

				nestingPrefix: '$t(',
				nestingSuffix: ')',
				// nestingPrefixEscaped: '$t(',
				// nestingSuffixEscaped: ')',
				defaultVariables: undefined // object that can have values to interpolate on - extends passed in interpolation data
			}
		};
	}

	function transformOptions(options) {
		// create namespace object if namespace is passed in as string
		if (typeof options.ns === 'string') options.ns = [options.ns];
		if (typeof options.fallbackLng === 'string') options.fallbackLng = [options.fallbackLng];
		if (typeof options.fallbackNS === 'string') options.fallbackNS = [options.fallbackNS];

		// extend whitelist with cimode
		if (options.whitelist && options.whitelist.indexOf('cimode') < 0) options.whitelist.push('cimode');

		return options;
	}

	var I18n = function (_EventEmitter) {
		babelHelpers.inherits(I18n, _EventEmitter);

		function I18n() {
			var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
			var callback = arguments[1];
			babelHelpers.classCallCheck(this, I18n);

			var _this = babelHelpers.possibleConstructorReturn(this, _EventEmitter.call(this));

			_this.options = transformOptions(options);
			_this.services = {};
			_this.logger = baseLogger;
			_this.modules = {};

			if (callback && !_this.isInitialized) _this.init(options, callback);
			return _this;
		}

		I18n.prototype.init = function init(options, callback) {
			var _this2 = this;

			if (typeof options === 'function') {
				callback = options;
				options = {};
			}
			if (!options) options = {};

			if (options.compatibilityAPI === 'v1') {
				this.options = babelHelpers.extends({}, get(), transformOptions(convertAPIOptions(options)), {});
			} else if (options.compatibilityJSON === 'v1') {
				this.options = babelHelpers.extends({}, get(), transformOptions(convertJSONOptions(options)), {});
			} else {
				this.options = babelHelpers.extends({}, get(), this.options, transformOptions(options));
			}
			if (!callback) callback = function callback() {};

			function createClassOnDemand(ClassOrObject) {
				if (!ClassOrObject) return;
				if (typeof ClassOrObject === 'function') return new ClassOrObject();
				return ClassOrObject;
			}

			// init services
			if (!this.options.isClone) {
				if (this.modules.logger) {
					baseLogger.init(createClassOnDemand(this.modules.logger), this.options);
				} else {
					baseLogger.init(null, this.options);
				}

				var lu = new LanguageUtil(this.options);
				this.store = new ResourceStore(this.options.resources, this.options);

				var s = this.services;
				s.logger = baseLogger;
				s.resourceStore = this.store;
				s.resourceStore.on('added removed', function (lng, ns) {
					s.cacheConnector.save();
				});
				s.languageUtils = lu;
				s.pluralResolver = new PluralResolver(lu, {
					prepend: this.options.pluralSeparator,
					compatibilityJSON: this.options.compatibilityJSON
				});
				s.interpolator = new Interpolator(this.options);

				s.backendConnector = new Connector(createClassOnDemand(this.modules.backend), s.resourceStore, s, this.options);
				// pipe events from backendConnector
				s.backendConnector.on('*', function (event) {
					for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
						args[_key - 1] = arguments[_key];
					}

					_this2.emit.apply(_this2, [event].concat(args));
				});

				s.backendConnector.on('loaded', function (loaded) {
					s.cacheConnector.save();
				});

				s.cacheConnector = new Connector$1(createClassOnDemand(this.modules.cache), s.resourceStore, s, this.options);
				// pipe events from backendConnector
				s.cacheConnector.on('*', function (event) {
					for (var _len2 = arguments.length, args = Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
						args[_key2 - 1] = arguments[_key2];
					}

					_this2.emit.apply(_this2, [event].concat(args));
				});

				if (this.modules.languageDetector) {
					s.languageDetector = createClassOnDemand(this.modules.languageDetector);
					s.languageDetector.init(s, this.options.detection, this.options);
				}

				this.translator = new Translator(this.services, this.options);
				// pipe events from translator
				this.translator.on('*', function (event) {
					for (var _len3 = arguments.length, args = Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
						args[_key3 - 1] = arguments[_key3];
					}

					_this2.emit.apply(_this2, [event].concat(args));
				});
			}

			// append api
			var storeApi = ['getResource', 'addResource', 'addResources', 'addResourceBundle', 'removeResourceBundle', 'hasResourceBundle', 'getResourceBundle'];
			storeApi.forEach(function (fcName) {
				_this2[fcName] = function () {
					return this.store[fcName].apply(this.store, arguments);
				};
			});

			// TODO: COMPATIBILITY remove this
			if (this.options.compatibilityAPI === 'v1') appendBackwardsAPI(this);

			var load = function load() {
				_this2.changeLanguage(_this2.options.lng, function (err, t) {
					_this2.emit('initialized', _this2.options);
					_this2.logger.log('initialized', _this2.options);

					callback(err, t);
				});
			};

			if (this.options.resources || !this.options.initImmediate) {
				load();
			} else {
				setTimeout(load, 0);
			}

			return this;
		};

		I18n.prototype.loadResources = function loadResources(callback) {
			var _this3 = this;

			if (!callback) callback = function callback() {};

			if (!this.options.resources) {
				var _ret = function () {
					if (_this3.language && _this3.language.toLowerCase() === 'cimode') return {
						v: callback()
					}; // avoid loading resources for cimode

					var toLoad = [];

					var append = function append(lng) {
						var lngs = _this3.services.languageUtils.toResolveHierarchy(lng);
						lngs.forEach(function (l) {
							if (toLoad.indexOf(l) < 0) toLoad.push(l);
						});
					};

					append(_this3.language);

					if (_this3.options.preload) {
						_this3.options.preload.forEach(function (l) {
							append(l);
						});
					}

					_this3.services.cacheConnector.load(toLoad, _this3.options.ns, function () {
						_this3.services.backendConnector.load(toLoad, _this3.options.ns, callback);
					});
				}();

				if ((typeof _ret === 'undefined' ? 'undefined' : babelHelpers.typeof(_ret)) === "object") return _ret.v;
			} else {
				callback(null);
			}
		};

		I18n.prototype.use = function use(module) {
			if (module.type === 'backend') {
				this.modules.backend = module;
			}

			if (module.type === 'cache') {
				this.modules.cache = module;
			}

			if (module.type === 'logger' || module.log && module.warn && module.warn) {
				this.modules.logger = module;
			}

			if (module.type === 'languageDetector') {
				this.modules.languageDetector = module;
			}

			if (module.type === 'postProcessor') {
				postProcessor.addPostProcessor(module);
			}

			return this;
		};

		I18n.prototype.changeLanguage = function changeLanguage(lng, callback) {
			var _this4 = this;

			var done = function done(err) {
				if (lng) {
					_this4.emit('languageChanged', lng);
					_this4.logger.log('languageChanged', lng);
				}

				if (callback) callback(err, function () {
					for (var _len4 = arguments.length, args = Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
						args[_key4] = arguments[_key4];
					}

					return _this4.t.apply(_this4, args);
				});
			};

			if (!lng && this.services.languageDetector) lng = this.services.languageDetector.detect();

			if (lng) {
				this.language = lng;
				this.languages = this.services.languageUtils.toResolveHierarchy(lng);

				this.translator.changeLanguage(lng);

				if (this.services.languageDetector) this.services.languageDetector.cacheUserLanguage(lng);
			}

			this.loadResources(function (err) {
				done(err);
			});
		};

		I18n.prototype.getFixedT = function getFixedT(lng, ns) {
			var _this5 = this;

			var fixedT = function fixedT(key, options) {
				options = options || {};
				options.lng = options.lng || fixedT.lng;
				options.ns = options.ns || fixedT.ns;
				return _this5.t(key, options);
			};
			fixedT.lng = lng;
			fixedT.ns = ns;
			return fixedT;
		};

		I18n.prototype.t = function t() {
			return this.translator && this.translator.translate.apply(this.translator, arguments);
		};

		I18n.prototype.exists = function exists() {
			return this.translator && this.translator.exists.apply(this.translator, arguments);
		};

		I18n.prototype.setDefaultNamespace = function setDefaultNamespace(ns) {
			this.options.defaultNS = ns;
		};

		I18n.prototype.loadNamespaces = function loadNamespaces(ns, callback) {
			var _this6 = this;

			if (!this.options.ns) return callback && callback();
			if (typeof ns === 'string') ns = [ns];

			ns.forEach(function (n) {
				if (_this6.options.ns.indexOf(n) < 0) _this6.options.ns.push(n);
			});

			this.loadResources(callback);
		};

		I18n.prototype.loadLanguages = function loadLanguages(lngs, callback) {
			if (typeof lngs === 'string') lngs = [lngs];
			var preloaded = this.options.preload || [];

			var newLngs = lngs.filter(function (lng) {
				return preloaded.indexOf(lng) < 0;
			});
			// Exit early if all given languages are already preloaded
			if (!newLngs.length) return callback();

			this.options.preload = preloaded.concat(newLngs);
			this.loadResources(callback);
		};

		I18n.prototype.dir = function dir(lng) {
			if (!lng) lng = this.language;

			var rtlLngs = ['ar', 'shu', 'sqr', 'ssh', 'xaa', 'yhd', 'yud', 'aao', 'abh', 'abv', 'acm', 'acq', 'acw', 'acx', 'acy', 'adf', 'ads', 'aeb', 'aec', 'afb', 'ajp', 'apc', 'apd', 'arb', 'arq', 'ars', 'ary', 'arz', 'auz', 'avl', 'ayh', 'ayl', 'ayn', 'ayp', 'bbz', 'pga', 'he', 'iw', 'ps', 'pbt', 'pbu', 'pst', 'prp', 'prd', 'ur', 'ydd', 'yds', 'yih', 'ji', 'yi', 'hbo', 'men', 'xmn', 'fa', 'jpr', 'peo', 'pes', 'prs', 'dv', 'sam'];

			return rtlLngs.indexOf(this.services.languageUtils.getLanguagePartFromCode(lng)) >= 0 ? 'rtl' : 'ltr';
		};

		I18n.prototype.createInstance = function createInstance() {
			var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
			var callback = arguments[1];

			return new I18n(options, callback);
		};

		I18n.prototype.cloneInstance = function cloneInstance() {
			var _this7 = this;

			var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
			var callback = arguments[1];

			var clone = new I18n(babelHelpers.extends({}, options, this.options, {
				isClone: true
			}), callback);
			var membersToCopy = ['store', 'translator', 'services', 'language'];
			membersToCopy.forEach(function (m) {
				clone[m] = _this7[m];
			});

			return clone;
		};

		return I18n;
	}(EventEmitter);

	var i18next = new I18n();

	return i18next;

}));